Fontana, CA Environmental Rules: Flood Zones (2026)

Sec. , mudflow) hazards within the jurisdiction of the city,' as identified in the Flood Insurance Study dated May 3, 1993 and the accompanying FIRM and FBFM maps adopted by Sec. 12-31. Sec. 12-36 creates the permit itself: 'A flood zone permit shall be obtained before construction of development begins within any area of special flood hazard,' with applications required to show, at minimum, the proposed elevation of the lowest habitable floor relative to mean sea level, any proposed floodproofing elevation, and a description of how the project will alter or relocate any watercourse.

The floodplain administrator, appointed under Sec. 12-37, reviews every application to confirm the permit requirements are met, that other state and federal permits are in hand, that the site is reasonably safe from flooding, and that the project will not raise the base flood water surface elevation more than one foot at any point, per Sec. 12-38(1)d. Sec. 12-32 makes noncompliance a misdemeanor: no structure or land may be 'constructed, located, extended, converted, or altered without full compliance with the terms of this article,' and the city can pursue any other lawful remedy against violations in addition to criminal prosecution.